Series A Preferred Stock	6 Months Ended
Jun. 30, 2021
Other Liabilities Disclosure [Abstract]
Series A Preferred Stock	Note 8. Series A Preferred Stock The Company authorized and issued 30 shares of Series A Preferred Stock, par value $0.01 to PDL in May 2017. The Series A Preferred Stock had an aggregate liquidation preference of $30,000 (“stated value”), plus all accumulated and unpaid dividends (whether or not declared). Dividends on each share of Series A Preferred Stock initially accrued on an annual basis at a rate of 15.0% per annum of the stated value, and subsequently decreased to 5.0% per annum of the stated value effective January 1, 2019 as amended in December 2018. Dividends were to be payable when and if declared by the board of directors. No dividends were declared by the board of directors from the time of issuance to the Series A Preferred Stock Recapitalization. Prior to the Series A Preferred Stock Recapitalization, the Series A Preferred Stock was accounted for as a liability on the Company’s condensed balance sheets because it was mandatorily redeemable. Upon completion of the Series A Preferred Stock Recapitalization, the Company does not currently have any shares of Series A Preferred Stock outstanding. See Note 1, Overview and Basis of Presentation, for more information on the Series A Preferred Stock Recapitalization. Interest expense recognized on the Series A Preferred Stock was $0 and $399 for the three months ended June 30, 2021 and 2020, respectively, and $0 and $797 for the six months ended June 30, 2021 and 2020, respectively.

Series A Preferred Stock

6 Months Ended

Jun. 30, 2021

Other Liabilities Disclosure [Abstract]

Note 8. Series A Preferred Stock

The Company authorized and issued 30 shares of Series A Preferred Stock, par value $0.01 to PDL in May 2017. The Series A Preferred Stock had an aggregate liquidation preference of $30,000 (“stated value”), plus all accumulated and unpaid dividends (whether or not declared). Dividends on each share of Series A Preferred Stock initially accrued on an annual basis at a rate of

15.0% per annum of the stated value, and subsequently decreased to 5.0% per annum of the stated value effective January 1, 2019 as amended in December 2018.

Dividends were to be payable when and if declared by the board of directors. No dividends were declared by the board of directors from the time of issuance to the Series A Preferred Stock Recapitalization.

Prior to the Series A Preferred Stock Recapitalization, the Series A Preferred Stock was accounted for as a liability on the Company’s condensed balance sheets because it was mandatorily redeemable. Upon completion of the Series A Preferred Stock Recapitalization, the Company does not currently have any shares of Series A Preferred Stock outstanding. See Note 1, Overview and Basis of Presentation, for more information on the Series A Preferred Stock Recapitalization. Interest expense recognized on the Series A Preferred Stock was $0 and $399 for the three months ended June 30, 2021 and 2020, respectively, and $0 and $797 for the six months ended June 30, 2021 and 2020, respectively.